<template>
    <div class="login_container">
        <!-- 头像区域 -->
        <div class="login_box">
            <div class="avatar_box">
                <img src="../assets/logo.png" alt="" srcset="">
            </div>
            <!-- 登录表单区域 -->
            <el-form ref="loginFormRef" :model="loginForm" :rules="loginFormRules" 
            label_width="0px" class="login_form">
                <!-- 用户名 -->
               <el-form-item prop="username">
                 <el-input v-model="loginForm.username" prefix-icon="iconfont icon-user"></el-input>
               </el-form-item>
               <!-- 密码 -->
                <el-form-item prop="password">
                 <el-input v-model="loginForm.password" prefix-icon="iconfont icon-3702mima" type="password"></el-input>
               </el-form-item>
               <!-- 按钮区域 -->
                <el-form-item class='btns'> 
                  <el-button type="primary" @click="login">登录</el-button>
                  <el-button type="info" @click="resetLoginForm">重置</el-button>
                </el-form-item>
            </el-form >
        </div>
    </div>
</template>



<script>
export default{
    data(){
        return{
            // 这是登录表单的数据绑定对象
            loginForm:{
                username:'admin',
                password:'123456'
            },
            // 这是表单的验证规制对象
            loginFormRules:{
            // 验证用户名是否合法
              username:[ 
                  { required: true, message: '请输入活动名称', trigger: 'blur' },
                  { min: 3, max: 10, message: '长度在 3 到 10 个字符', trigger: 'blur' }
                  ],
            // 验证密码是否合法
              password:[
                  { required: true, message: '请输入活动密码', trigger: 'blur' },
                  { min: 3, max: 15, message: '长度在 3 到 15 个字符', trigger: 'blur' }
              ]
            }
        };
    },
    methods:{
        // 点击重置按钮，重置登录表单
        resetLoginForm(){
            // console.log(this)
            this.$refs.loginFormRef.resetFields();
        },
        login(){
            this.$refs.loginFormRef.validate(async valid=>{
                // console.log(valid);
                if(!valid) return;
                const {data:res} = await this.$http.post("login", this.loginForm);
                if(res.meta.status !==200) return this.$message.error('登录失败！');
                this.$message.success('登录成功');
                // 1．将登录成功之后的token，保存到客户端的sessionStorage中
                //    1.1项目中出了登录之外的其他API接口，必须在登录之后才能访问
                //    1.2 token只应在当前网站打开期间生效，所以将 token保存在sessionStorage中
                console.log(res);
                window.sessionStorage.setItem("token",res.data.token);
                // 2．通过编程式导航跳转到s台主页，路由地址是/home
                this.$router.push("/home");




            });
        }
    }
}
</script>


<style lang="less" scoped>
.login_container{
    background-color: #2b4b6b;
    height: 100% ;
}
.login_box{
    width: 450px;
    height: 300px;
    background-color: #fff;
    border-radius: 3px;
    position: absolute;
    left: 50%;
    top: 50%;
    transform: translate(-50%,-50%);
   
}
.avatar_box{
    height: 130px;
    width: 130px;
    border: 1px solid #eee;
    border-radius: 50%;
    padding: 10px;
    box-shadow: 0 0 10px #ddd;
    position: absolute;
    left: 50%;
    transform: translate(-50%,-50%);
    background-color: #fff;
    img{
        width: 100%;
        height: 100%;
        border-radius: 50%;
        background-color: #eee;
    }
}
.login_form{
    position: absolute;
    bottom: 0;
    width: 100%;
    padding: 0 20px;
    box-sizing: border-box;

}
.btns{
    display:flex ;
    justify-content: flex-end;
}


</style>
